RUKO SPB-DIN1869-7.0mm-Serie-1 Extra Long Twist Drill Bit 7.0 mm HSS-G Morse Taper MT1

Deep-hole drilling in tough metals demands a tool that stays accurate and doesn't wander. The RUKO SPB-DIN1869-7.0mm-Serie-1 is an extra long twist drill bit with a 7.0 mm diameter, engineered for precisely that challenge. Its ground HSS-G body and Morse taper shank deliver the rigidity and chip clearance needed for clean, straight bores in alloyed steel, cast iron, and non-ferrous metals.

Who is it for

Machinists, metal fabricators, and maintenance crews who regularly drill deep holes in hard materials. If standard jobber-length bits bottom out too soon or flex under load, this extra long series provides the reach and stability to finish the job in one pass.

Main features

• 7.0 mm diameter with h8 tolerance for precise hole sizing
• Extra long overall length of 205 mm and 130 mm flute length for deep-hole work
• Morse taper shank MT1 for secure, concentric mounting in machine spindles
• Ground from solid HSS-G for high hardness and good heat resistance up to 600°C
• Right-hand cutting with 118° point angle for efficient chip formation

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 1869
• Material: HSS-G (ground high-speed steel)
• Diameter: 7.0 mm
• Shank type: Morse taper MT1
• Overall length: 205 mm
• Flute length: 130 mm
• Point angle: 118°
• Cutting direction: Right-hand
• Tolerance: h8
• Surface treatment: Bright / ground
• Suitable materials: Alloyed and unalloyed steel, grey cast iron, malleable cast iron, non-ferrous metals, plastics

Tips

Use a pilot hole for diameters above 8 mm to reduce thrust and improve accuracy. Apply cutting fluid when drilling steel to extend tool life and improve surface finish. Always secure the Morse taper shank firmly in the machine spindle to prevent slipping.